For the record

• The vaquita (Phocoena sinus) is a porpoise endemic to the Gulf of California (Sea of Cortes), and not to the Gulf of Mexico, as we suggested (22/29 December 2007, p 19).

• A. C. Grayling’s comment on the fate of conceptions should have read&colon; “an estimated quarter of all pregnancies spontaneously terminate before the sixth week… overall about one in five recognised pregnancies spontaneously terminate before 20 weeks” (22/29 December 2007, p 76).

• We said a victim of hurricane Katrina was suing for &dollar;3 thousand billion (19 January, p 21) but the claim is in fact for &dollar;3 …